Guide-needle for warp knitting machines



Dec. 4, 1962 K. KOHL 3,066,510

GUIDE-NEEDLE FOR WARP KNITTING MACHINES Filed April 21, 1959 I N V EN TOR KARL xo/fl.

Attorneys United States Patent 3,066,510 GUIDE-NEEDLE FOR WARP KNITTING MACHINES Karl Kohl, Hainstadt (Main), Germany, assignor to Karl Mayer, Hessische Wirkmaschinenfabrik G.m.b.H., Obertshausenynear Offenbach (Main), Germany Filed Apr. 21, 1959, Ser. No. 807,856 Claims priority, application Germany Apr. 22, 1958 4 Claims. (CI. 66-86) The present invention relates to knitting machines. More in particular, the present invention relates to warp knitting machines, and more particularly still to a new and useful guide-needle mounting for warp knitting machines.

The gnide-needles for warp knitting machines known in the art have a straight configuration and are soldered in a lead support vertically with respect to the direction of the warp knitting operation.

These known, straight guideneedles as Well as their vertical mounting in the support lead are the source of grave and considerable disadvantages. It has been found that, for example, in the processing of rubber threads, napped yarns, and the like, the unavoidable turning and bending of the threads upon conveying them through the needle eye of the guide-needles produce a considerable stress and strain of the threads. Frequently the threads are worn and even damaged. Particularly within the zone of their outer filaments, the wrappings of rubber threads are destroyed and napped yarns are frequently broken.

It has already been proposed in the art to avoid these disadvantages by providing for a bead-like notch in the needle. However, all that is attained by this arrangement is that the damaging effect of the upper edge of the eye portion of the needle upon introducing the thread into the eye is reduced to a certain extent. There still remain the damaging effects produced by turning the thread and by leading the thread out of the needle eye. Furthermore, it is not feasible to provide for such a bead-like notch for lack of space.

With the foregoing in mind, it is an object of the present invention to provide a guide-needle for warp knitting machines which produces a minimum of strain and wear of the threads passed through the needle eye of the guide-needle.

It is another object of the present invention to provide a guide-needle for warp knitting machines which safely guides the threads and eliminates any danger of breaking the threads as a result of their passing through the needle eye of the guide-needle.

It is still another object of the present invention to provide a guide-needle for warp knitting machines 'in which the sharp turning and bending of the thread when passing into and out of the needle eye of the guide-needle is avoided.

It is a further object of the present invention to pro vide for a guide-needle mounting which greatly reduces the stress and wear of the threads and prevents their breaking and tearing as a consequence of their passing through the needle eye of the guide-needle.

These objects are achieved and the disadvantages of the known guide-needles are avoided by the guide-needle and/or its mounting in the lead support of the present invention.

According to the invention the guide-needle is either obliquely mounted in the lead support or it is obliquely bent within the range of the needle eye, with respect to the direction of the warp knitting operation.

When using the oblique mounting of the guide-needle of the invention, it will also be advantageous to shape the two extreme edges of the needle lead support also 3,066,510 Patented Dec. 4, 1962 obliquely and at an angle which equals that of the oblique position of the needle. This arrangement allows the guide needles to be used for any kind of material as they can be positioned at the smallest necessary distance from one another.

According to a preferred embodiment of the invention the lowermost end portion of the needle below the needle eye is again bent with respect to the bent portion with the needle eye, so as to be positioned parallel with regard to the needle shaft. Similarly, it is furthermore possible to provide for a needle eye whose confining walls also extend parallel relative to the needle shaft.

The invention will be better understood upon the following description of the accompanying drawings, where- 1n:

FIGURE 1 is a front view, partly in section, of an embodiment of the guide needle of the present invention, whose lowermost portion below the bent portion with the needle eye is again bent so as to be positioned parallel relative to the needle shaft;

FIGURE 2 is a front view, partly in section, of another embodiment of the guide needle of the invention, in which the walls defining the needle eye extend parallel with respect to the needle shaft;

FIGURE 3 is a front view of the guide-needle mounting of the present invention and shows the guide needles being mounted obliquely with respect to the direction of the warp-knitting operation.

Referring now to the drawing somewhat more in detail, the lower end of the guide-needle 1 shown in FIGURE 1 is bent twice in the area with the needle eye 2 so that the thread 3 can pass through the eye 2 substantially without being turned and bent. The edges 4 and 5 of the needle eye therefore do not have a damaging effect on the thread. The needle eye 2 is provided in the oblique portion 1a. The end below the eye 2 is bent in such a way that it is located parallel relative to the shaft of the needle 1.

The threads can be further protected by the guide-needle shown in FIGURE 2 where the central axis 7 of the needle eye 2a extends in a direction substantially parallel relative to the needle shaft.

The oblique mounting of the guide-needle is illustrated in FIGURE 3. The needle lead supports 81 have oblique edges 9 and bores 8a for mounting the needle lead supports by screw or bolt means in a known manner onto the movable guide bar of a warp knitting machine. The straight guide-needles 10 are soldered in these lead supports. The angle of their inclined positions is equal to that of the edges 9. This is another way of preventing breaking or tearing of the threads when passing through the needle eyes.

It will be understood that this invention is susceptible to modification in order to adapt it to different usages and conditions and, accordingly, it is desired to comprehend such modifications within this invention as may fall within the scope of the appended claims.

What I claim is:

1. A thread guide for mounting onto the movable guide bar of a warp knitting machine and comprising a plurality of needle lead supports for side-by-side attachment on a movable guide bar with said supports having parallel upper and lower edges, the contiguous sides of said supports being oblique at the same angle with respect to said parallel edges, a plurality of spaced parallel guide needles projecting from the lower edges of said supports for delivering a plurality of threads in side-by-side relationship to the knitting elements of a warp knitting machine, said guide needles extending from said lower edges at an oblique angle with respect to said lower edges, thereby preventing breaking of the threads.

2. A thread guide for mounting onto the movable guide bar of a warp knitting machine and comprising a plurality of needle lead supports for side-by-side attachment on a movable guide bar with said supports having parallel upper and lower edges, the contiguous sides of said supports being oblique at the same angle with respect to said parallel edges, a plurality of spaced parallel guide needles projecting from the lower edges of said supports for delivering a plurality of threads in side-by-side relationship to the knitting elements of a warp knitting machine, said guide needles extending from said lower edges at the same angle at which said contiguous sides of said supports are oblique to said upper and lower edges of said supports, thereby preventing breaking of the threads.

3. A thread guide as claimed in claim 2 with said guide needles forming a straight line where they project from said lower edges of said supports.

4. In a warp knitting machine, a guide needle mounting as claimed in claim 2, wherein the connection between said guide needles and said lead supports is a solder connection.

References Cited in the file of this patent UNITED STATES PATENTS Kinsella et a1. Sept. 17, Anderson Sept. 2, Erdinan et a1. Aug. 18, Lambach Oct. 21, Eshleman Aug. 30, Noe Aug. 7, Walford June 15, Schoenster Sept. 28, Weinberg Nov. 16, Schoenster Feb. 11,

FOREIGN PATENTS Belgium Aug. 31,

OTHER REFERENCES Technologie Der Kettenwerkerei, 1942. 

